ECET 380 Week 6 iLabIntroduction to OFDM Generation

ECET 380 Week 6 iLabIntroduction to OFDM Generation

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Attachments: ECET 380 NA Week 6 Lab Introduction to OFDM Generation.docx [ Preview Here ]

Introduction to OFDM Generation

I.OBJECTIVES

  1. Introduce the student to the underlying theory of operation of Orthogonal Frequency Division Multiplexing (OFDM).
  2. Learn to use TIMS modules to implement an OFDM generator scheme.
  3. Generate and analyze OFDM waveforms.

 

II.      PARTS LIST

Equipment:

            IBM PC or Compatible with Windows 2000 or Higher

Software:

            TutorTIMS – Version 2.0 Advanced

 

The following TIMS modules will be required for the lab. Read about the modules required for the particular lab section before proceeding:

 

  1. Sequence Generator
  2. Multiplier
  3. M-Level Encoder
  4. Phase Shifter
  5. Master Signals
  6. Adder
  7. Tunable LPF
  8. 100 KHz Channel Filters
  9. Decision Maker

 

III.INTRODUCTION

 

OFDM (Orthogonal Frequency Division Multiplexing) is a combination of modulation and multiplexing, and more specifically, is a special case of Frequency Division Multiplexing (FDM), as the name implies. 

 

A single main data stream is split into many lower rate data streams (multiplexing).  Each of these streams is then individually modulated onto a separate sub-carrier (modulation) and finally recombined into a single composite OFDM signal to be transmitted.

 

The addition of a cyclic prefix is also an important part of OFDM, however, this feature will be discussed but not implemented in this introductory experiment.  The coding blocks will not be covered in detail within this experiment.

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